Buggy code:
public class DeltaProcessor implements IResourceChangeListener { static final int IGNORE = 0 ; static final int SOURCE = 1 ; static final int BINARY = 2 ; static final String EXTERNAL_JAR_ADDED = "external<seq2seq4repair_space>jar<seq2seq4repair_space>added" ; static final String EXTERNAL_JAR_REMOVED = "external<seq2seq4repair_space>jar<seq2seq4repair_space>removed" ; static final String EXTERNAL_JAR_CHANGED = "external<seq2seq4repair_space>jar<seq2seq4repair_space>changed" ; static final String EXTERNAL_JAR_UNCHANGED = "external<seq2seq4repair_space>jar<seq2seq4repair_space>unchanged" ; static final String INTERNAL_JAR_IGNORE = "internal<seq2seq4repair_space>jar<seq2seq4repair_space>ignore" ; static final int NON_JAVA_RESOURCE = - 1 ; protected JavaElementDelta currentDelta ; protected IndexManager indexManager = new IndexManager ( ) ; public Map roots ; Map otherRoots ; public boolean rootsAreStale = true ; public Map oldRoots ; Map oldOtherRoots ; Map sourceAttachments ; Openable currentElement ; public HashMap externalTimeStamps = new HashMap ( ) ; public HashSet projectsToUpdate = new HashSet ( ) ; public HashSet projectsForDependentNamelookupRefresh = new HashSet ( ) ; JavaModelManager manager ; Map removedRoots ; HashSet refreshedElements ; public static boolean VERBOSE = false ; class OutputsInfo { IPath [ ] paths ; int [ ] traverseModes ; int outputCount ; OutputsInfo ( IPath [ ] paths , int [ ] traverseModes , int outputCount ) { } public String toString ( ) { } } class RootInfo { IJavaProject project ; IPath rootPath ; char [ ] [ ] exclusionPatterns ; RootInfo ( IJavaProject project , IPath rootPath , char [ ] [ ] exclusionPatterns ) { } boolean isRootOfProject ( IPath path ) { } public String toString ( ) { } } DeltaProcessor ( JavaModelManager manager ) { } void addDependentProjects ( IPath projectPath , HashSet result ) { try { IJavaProject [ ] projects = this . manager . getJavaModel ( ) . getJavaProjects ( ) ; for ( int i = 0 , length = projects . length ; i < length ; i ++ ) { IJavaProject project = projects [ i ] ; <START_BUG> IClasspathEntry [ ] classpath = project . getResolvedClasspath ( true ) ; <END_BUG> for ( int j = 0 , length2 = classpath . length ; j < length2 ; j ++ ) { IClasspathEntry entry = classpath [ j ] ; if ( ( ( entry . getEntryKind ( ) ) == ( IClasspathEntry . CPE_PROJECT ) ) && ( entry . getPath ( ) . equals ( projectPath ) ) ) { result . add ( project ) ; } } } } catch ( JavaModelException e ) { } } public void addForRefresh ( IJavaElement element ) { } void addToProjectsToUpdateWithDependents ( IProject project ) { } protected void addToParentInfo ( Openable child ) { } public void checkExternalArchiveChanges ( IJavaElement [ ] refreshedElements , IProgressMonitor monitor ) throws JavaModelException { } public boolean createExternalArchiveDelta ( IProgressMonitor monitor ) throws JavaModelException { } JavaElementDelta currentDelta ( ) { } public void checkProjectsBeingAddedOrRemoved ( IResourceDelta delta ) { } private void checkSourceAttachmentChange ( IResourceDelta delta , IResource res ) { } protected static void close ( Openable element ) { } protected void contentChanged ( Openable element , IResourceDelta delta ) { } protected Openable createElement ( IResource resource , int elementType , DeltaProcessor . RootInfo rootInfo ) { } public void deleting ( IProject project ) { } protected void elementAdded ( Openable element , IResourceDelta delta , DeltaProcessor . RootInfo rootInfo ) { } protected void elementRemoved ( Openable element , IResourceDelta delta , DeltaProcessor . RootInfo rootInfo ) { } private int elementType ( IResource res , int kind , int parentType , DeltaProcessor . RootInfo rootInfo ) { } public static long getTimeStamp ( File file ) { } public void initializeRoots ( ) { } public boolean isAffectedBy ( IResourceDelta rootDelta ) { } private boolean isResFilteredFromOutput ( DeltaProcessor . OutputsInfo info , IResource res , int elementType ) { } protected void nonJavaResourcesChanged ( Openable element , IResourceDelta delta ) throws JavaModelException { } private DeltaProcessor . OutputsInfo outputsInfo ( DeltaProcessor . RootInfo rootInfo , IResource res ) { } public void performPreBuildCheck ( IResourceDelta delta , IJavaElement parent ) { } private void popUntilPrefixOf ( IPath path ) { } public IJavaElementDelta processResourceDelta ( IResourceDelta changes ) { } void reconcileClasspathFileUpdate ( IResourceDelta delta , IFile file , JavaProject project ) { } void reconcilePreferenceFileUpdate ( IResourceDelta delta , IFile file , JavaProject project ) { } protected void removeFromParentInfo ( Openable child ) { } public void resourceChanged ( IResourceChangeEvent event ) { } DeltaProcessor . RootInfo enclosingRootInfo ( IPath path , int kind ) { } DeltaProcessor . RootInfo rootInfo ( IPath path , int kind ) { } ArrayList otherRootsInfo ( IPath path , int kind ) { } protected boolean traverseDelta ( IResourceDelta delta , int elementType , DeltaProcessor . RootInfo rootInfo , DeltaProcessor . OutputsInfo outputsInfo ) { } void updateClasspathMarkers ( ) { } private boolean updateCurrentDeltaAndIndex ( IResourceDelta delta , int elementType , DeltaProcessor . RootInfo rootInfo ) { } public void updateDependentNamelookups ( ) { } protected void updateIndex ( Openable element , IResourceDelta delta ) { } private void updateRootIndex ( IPackageFragmentRoot root , IPackageFragment pkg , IResourceDelta delta ) { } private void updateRoots ( IPath containerPath , IResourceDelta containerDelta ) { } }

Fix:
IClasspathEntry [ ] classpath = ( ( JavaProject ) ( project ) ) . getExpandedClasspath ( true ) ;